If you've been prompted to reset your password or received a security notice from Yahoo, you can learn more about your account security on our help page.

Error: "Your login session has expired"

Yahoo displays this message and asks that you sign in again as a safeguard for Yahoo Mail users, especially those who use public or shared computers.

You'll see this message if it's been more than eight hours since you last signed in to Yahoo Mail and still haven't signed out. 

Good to know: if the time isn't set correctly on your computer, browsers will have difficulty managing cookie files and generate error messages more frequently.